ERBB2 and breast cancer: While Metsiou et al. studied the biomechanics of adhered and suspended breast cancer cells using the MA method, they mainly focused on comparing cell stiffness and viscoelastic parameters of MCF-7 (ER+) and SKBR-3 (HER2+) human breast cancer cell lines prior to and post-treatments of tamoxifen and trastuzumab.